It has some further impacts as well. While the exhaust is outside of the engine itself, it can often cause sounds that are confused for an internal engine rattle. There are many brands and models available. Of course! Has always made the noise ever since I bought it 4 years ago with 150k miles. Ignition pinging is often interpreted as a rattle at first because of the metal-on-metal noise it creates, and it is commonly heard only on acceleration. when switching off the engine. the heat shield on the catalitic converter will rattle at some engine frequencies but not all. Consequently, you may hear a pinging or rattling sound (spark knock) when accelerating, driving up a hill; or when the engine is lugging under a heavy load. It’s tough to detect a cracked flywheel because it’s … So, in this section, we’ll be taking you through a set of steps that will get it done right away. Save Share. Open up the muffler and check for any baffle or other kinds of components. Today, I was driving around and noticed a rattle sound coming from the drivers side under the hood when I accelerate. Regardless of the fault, you must identify and correct the problem quickly -- otherwise your problem will get worse. The sound is very hard to describe, it's definitely a metallic sound though. The baffles in my muffler blew apart, under hard acceleration the rattle was terrible but at cruising speed it was normal. When you are accelerating the car, the exhaust pipe gets in contact with these items. This might turn it to break off by hitting the bump. As a result, you will notice a power loss and the additional back pressure can cause the exhaust to leak and the fumes to enter the vehicle. Rattling noise during acceleration can be caused by several different but common failures, including loose heat shields, bad belt pulleys and ignition pinging. Engine Knocking - Pinging - Rattling Noise - Common Causes Is your engine making an annoying knocking, pinging or rattling sound when you accelerate. Broken Belt Tensioner or Chain Tensioner. I was just wondering if it could be my original cat or my dynomax turbo muffler that … Has always made the noise ever since I bought it 4 years ago with 150k miles. My Prius makes a rattle noise under medium acceleration. System Efficiency Below Threshold (bank 1) However, when I start the car cold, there is a flutter/rattle when accelerating at low speeds. I hear those have the same symptoms? When you hear a rattling sound, the source can be one of the many parts of the engine and exhaust system. If you decide to install a new muffler, make sure it suits your car’s model. When the car is cold, under acceleration, it rattles good. In case you can’t figure it out yet, you should take the consultancy of a professional car mechanic instead. Trying to help a friend out with diagnosing what appears to be an exhaust rattle. Sometimes, metal pipes around the muffler can already be damaged. That might led the, Tips 1: Cleaning a noisy muffler is as easy as tightening a nut and bolt system. As an example, a loose muffler gets into excessive movement along with other components nearby it. I also feels like something is holding down the acceleration of the vehicle during the time I hear that rattling sound. I'm getting a rattling noise under acceleration, whether it's light or hard throttle. You say "typically" you run 91 octane. Or was this just two unfortunate unrelated car problems, Is there any chance it could be something besides the catalytic converter like a simple leak? If can be a muffling sound, a whining sound, a rattling sound. And that’s what creates this rattling noise. I'm getting an exhaust rattle when I crank my challenger up. The bearings are what allow the cam and crankshaft to spin for thousands of miles and millions of revolutions. After headers and full exhaust I developed a rattle after several months. We will take you through the steps. The flaps in the exhaust might not be opening … However, based on your description, this is the first thing that comes to my mind. This can cause the rattling noise that you will hear from under the vehicle. When I began to accelerate through the first two or three gears there was a rattle that seemed to come from the engine compartment on the passenger side. As far as an O2 sensor, they wouldn't cause a noise. I also feels like something is holding down the acceleration of the vehicle during the time I hear that rattling sound. Well, there are many components that are nearby the exhaust pipe. This kind of objects often turns the muffler to come loose and cause internal rattling noises. The other noise you might be accustomed to is that of a loud exhaust system. Take help from the manufacturers if needed. This rattle noise under the car can appear to come from under the car instead of the rear of the vehicle, showing that the exhaust pipe can be a clear cause of the rattling noise. Heat Shield. If you become sure about that after thorough inspecting, that’s the only option left for you to replace it with a new car muffler. Anymore acceleration to speeds beyond that do not make this sound. Two codes actually, but both pointing to the mass air flow sensor, I checked my air filter this morning and it looks fairly clean still. Or the catalytic shield. California Car- Is Problem In Front Or Rear Cat? Taking it to a mechanic soon but will try that when I get home! If you have a car with active exhaust, it’s possible that the rattling noise that you hear when accelerating is caused by a component of the active exhaust system. In addition, the exhaust noise might be louder than is when you are driving your cars. This is most noticeable when accelerating because the valves are moving much faster. I have a 2000 S-10 with a 2.2L, regular cab and I have 136,xxx miles on it. To clean up the internal dust out of the muffler, you need a car cleaning brush with a long handle. Now has 210k miles. Some of these include: Loose or broken pipe connection; Rusty muffler; Blown exhaust gasket; Broke or disconnected exhaust … Exhaust Rattle. I have a 2010 tacoma 4 cyl manual transmission. I poked around under the truck; my best guess is that the noise is coming from the area where the exhaust headers come together into a common pipe, … And the job of the muffler is to reduce the noise that comes from the engine section. While the exhaust is outside of the engine itself, it can often cause sounds that are confused for an internal engine rattle. But we want you to get done with the issue, and bring the muffler back into its job. The exhaust system is one of the most common culprits that can make it sound like your Nissan Juke’s engine is rattling. But sometimes, that may not be the only issue to take care of. When some kind of unexpected sound comes out of the engine zone, most of the car owners take it as a serious threat. Maybe they forgot something when … You may consider getting several sizes of it for more proficiency. In addition, the exhaust noise might be louder than is when you are driving your cars. That might led the exhaust system not to work properly. The exhaust system is one of the most common culprits that can make it sound like your Kia Soul’s engine is rattling. There are other issues available such as loosen up connection, rust-affected parts and so on. This may not be specific to 2G MDXes, since I have this on my 1G MDX as well as my ex's TL. In extreme cases, some muffler gets into an unrepairable condition. Especially, while you’re speeding the car up. The car still accelerates but is slightly less powerful and exhaust fumes quickly built up in my car. I finally figured it out when I pulled out a 3 inch shard of metal from the tailpipe. The effect of a noisy muffler is not only lied within a disturbance. As soon as I move my car and get to … The rattling noise seems to have disappeared? Another possible reason for muffler noise is, there can be issues in parts that are not directly connected to the muffler. I've was having a noise similar to previously described on acceleration that was resolved. An occasional rattle from the silencer (muffler?) Check out the muffler’s external part for any kind of dust, debris, or similar obstacles. This can cause the rattling noise that you will hear from under the vehicle. Tips 2: Check out the internal section of the muffler, To clean up the internal dust out of the muffler, you need a. . The Transmission Fluid Level. This may not be specific to 2G MDXes, since I have this on my 1G MDX as well as my ex's TL. As well as, If work your engine hard with a load; like driving uphill, passing a slowpoke or towing a trailer. There could be an exhaust leak, but that would either be a louder engine sound or if it is a small leak, it could sound like a ticking. When i accelerate I hear a rattling noise like something being shaken in an empty metal can. It sounds like it's coming from the under carriage but I can't be certain. I Brought My Perfectly Fine Car In For New Tires. A metal rattling sound when I accelerate from a slow speed or from a complete stop. Nothing is loose under the hood (prop, washer fluid reservoir ect.) So, the adjacent parts will be in stress, which brings in more noise. An occasional gassy/exhaust smell from the OSF wheel arch. 2015 Crosstrek - metal rattle sound when accelerating. This rattle noise under the car can appear to come from under the car instead of the rear of the vehicle, showing that the exhaust pipe can be a clear cause of the rattling noise. As the exhaust system works as a whole unit, any kind of presence of unexpected materials may lead to several problems like noise, vibration, and so on. Now, what is the source of the rattling noise in the muffler? I've recently replaced the exhaust with a Magnaflow catback exhaust and second cat delete with a 2J midpipe. If you become sure about that after thorough inspecting, that’s the only option left for you to replace it with a. . Here a video clip for fixing muffler noise easily! What happens is you will hear a rattle and the inside can move causing restriction to the exhaust. As a benefit, you don’t get bothered by the highly irritating engine noise. Happens for only about 2 seconds when what I believe is the valves moving on the active exhaust. Acceleration Rattle. The baffles in my muffler blew apart, under hard acceleration the rattle was terrible but at cruising speed it was normal. Jul 9, 2019 at 11:19 PM #1 #1. bdh10 [OP] Member. We tighten the bolts from the exhaust pipe to the manifold as they were a little loose but the noise remains. Happens for only about 2 seconds when what I believe is the valves moving on the active exhaust. It was the flex pipe rattling on the frame under very low acceleration. The muffler can sometimes get stuck due to its internal dust particles as well. When I Turn On My Defrost It Smells Like Gas Or Exhaust, What Could Cause This? When the car warms up after I drive for 20 minutes, the rattle goes away. Recently my car started overheating due to a leak in my heater hose. As the vehicle moves, the loose muffler gets hammered into the other parts of the car’s body producing the characteristic rattling sound. Now has 210k miles. It's not doing it on idle or with throttle while in park. I've heard a few theories like the oil control valve or the catalytic converter. When you are dealing with a problem of muffler noise when accelerating, there is a 90% chance that an uncleaned or jammed out muffler is the culprit behind. Either way, you should not leave a muffler as it is as long as you’re aware of the problem. Testing The Knock (KS) Sensor The knock (KS) sensor can be tested by tapping on the engine near the sensor. Jump to Latest Follow 1 - 5 of 5 Posts. When the belt no longer moves smoothly along the pulleys, it makes a noise when the car is accelerating. As a result, the muffler cancels the harsh and loud noises that come out of the engine. It could be other things as well. You may consider getting several sizes of it for more proficiency. Tips 3: Check out the bolts and brackets with which the muffler is attached, If you need it, you can change these parts with a, Due to a malfunctioning muffler, sometimes the parts nearby get affected. It’s not a major issue, but you would want to check it to rule out the … My '99 Legacy is far from quiet, but yesterday I heard a new – and somewhat alarming – noise. 1997 Subaru Outback All Wheel Drive Automatic 140000 Miles An engine rattling noise, or a clicking sound in an engine, can spring up from a number of sources. It sounds like a … In the past few weeks, I have been hearing a rattle is coming from my Scatpack exhaust. Uses a Qt of oil every 1500 miles. My Exhaust Is Extremely Loud. If you need it, you can change these parts with a new car bracket instead. I guess I have just gotten used to this, but someone pointed out recently who was in my car that when I accelerate at slow to moderate speeds, there is this rattling tin can noise. A loose bracket, rubber hanger or connector, or one that is badly corroded, can allow a muffler to rattle as the exhaust pipe bangs against another part … So maybe under acceleration but not while crusing. Like McLovin, seems to be worse when the engine is cold, and mine seems to rattle nicely at about 3200 rpm. There can be rust or debris around the parts of the muffler if you don’t take care of the muffler noise pretty soon. I did some search and found some people with … The car seems to drive fine and the mods have made it a lot more enjoyable. While There, The Mechanic Told Me The Serpintine Belt Needed Replacing. Something Is Also Rattling.... https://www.2carpros.com/articles/mass-air-flow-service. I've installed a 2J pulley and an Injen SRI. Post Reply. There are a lot of different components inside an exhaust system that can cause your car to rattle when accelerating. The items can be exhaust rubber hanger, loose exhaust bracket, exhaust connectors, etc. This rattle noise under the car can appear to come from under the car instead of the rear of the vehicle, showing that the exhaust pipe can be a clear cause of the rattling noise. (engine knocking) The structure of the muffler consists of perforated tubes or chambers. Drive belts, timing belts, and timing chains need to have a … There can be rust or debris around the parts of the muffler if you don’t take care of, In extreme cases, some muffler gets into an unrepairable condition. Could that possibly mean anything for this problem or is this entirely separate? What I suggest is this. The car still accelerates but is slightly less powerful and exhaust fumes quickly built up in my car. Uses a Qt of oil every 1500 miles. Spark knock always sounds like a rattle to me. Update soon. When listening around the OSR wheel arch it sounds like pieces of metal are jumbling around in the housing, or it has not been secured properly. I'm getting an exhaust rattle when I crank my challenger up. As soon as I move my car and get to … Reply. My Prius makes a rattle noise under medium acceleration. Code P0420= Cat. When you are accelerating the car, the exhaust pipe gets in contact with these items. These items can get accidentally in touch with the muffler, and that’s what creates the rattling noise in the muffler. Mine does this too, rattles whenever I accelerate from a dead stop to about 20 MPH. This happens on my 1997. next time I will buy the best cat converter or OEM instead of getting what ever the muffler shop puts on. I was told my air filter could need changing as-well. When the valves wear they will make a clicking noise. Then, Most likely you’re probably experiencing spark knock. Or O2 sensor? So far, we’ve been discussing the problems of a noise muffler, and the reasons. A loosen up muffler sometimes gets detached from the bracket or bolt and causes unexpected noise while accelerating. Edited January 23, 2017 by Trp234 The valves open and close to let in air and fuel and let out the exhaust. There are many brands and models available. It creates opposing sound waves that prevent the engine noise to come out. And that’s what creates this rattling noise. Discussion in '2nd Gen. Tacomas (2005-2015)' started by bdh10, Jul 9, 2019. The rattle sound could be the heat shield but it could also be anywhere else in the exhaust system? Anymore acceleration to speeds beyond that do not make this sound. Anybody have ideas, I will look at the heat shield. The exhaust system includes the muffler, resonator, catalytic converter, and header/down pipe. Ever run anything lower? Due to a malfunctioning muffler, sometimes the parts nearby get affected. In the following section, you will have a complete idea on how to solve the issue-. The rattling sound is temporary and goes away when I reach 30 - 40 mph. Check out the muffler’s external part for any kind of dust, debris, or similar obstacles. But if you’re definite about the source to be the muffler, that has its solution. While my car sits idle I can rev my car and never hear the rattle. Take a rubber mallet and tap pm the exhaust to see if you can locate the noise. It will make the noise as it passes the rpm if you accelerate a bit more briskly but after a certain throttle input point I think it passes the rpm too quickly to produce the symptom. Sometimes, metal pipes around the muffler can already be damaged. I can try to get a look at my MAF sensor soon and get some cleaner just in case it s dirty, I ll check back soon. A muffler is a part of the exhaust system, and it’s installed onto the exhaust pipe. I've heard a few theories like the oil control valve or the catalytic converter. The rattle sound could be the heat shield but it could also be anywhere else in the exhaust … But before that, let us tell you the consequences of a rattling muffler-. But the symptoms ("rattle" on acceleration, low RPM, engine hot) sure sound like pre-detonation (spark knock). Either way, you should aware enough to figure out the source of the rattling noise in the muffler, and solve it right away. Cracked Flywheel or Flexplate Repair Costs. The rattling sound is temporary and goes away when I reach 30 - 40 mph. But I haven t driven on the highway so maybe it only appears after my car has been driven for longer or at faster speeds. Whether it's engine knocking when accelerating or some kind of spark knock or just a general engine noise, some are more serious than others, but there’s one thing that’s true of … I got it replaced a few days ago and the problem was solved! Heat Shield. Sometimes, metal pipes around the muffler can already be damaged. A metal rattling sound when I accelerate from a slow speed or from a complete stop. I guess I have just gotten used to this, but someone pointed out recently who was in my car that when I accelerate at slow to moderate speeds, there is this rattling tin can noise. I have to be honest. Raised back up and all fixed. I would have guessed a header or exhaust heatshield from the video. Model Year 2012 to 2017 . Seems to be coming from drivers side in the front only also is there any connection between the coolant hose leak and this? Eventually, with this variant movement, the muffler can get into a lower position than where it should be. What have you done to it? The rattling noise is typically heard while driving especially during acceleration or when you drive on poorly-paved roads. While my car sits idle I can rev my car and never hear the rattle. Nothing is loose under the hood (prop, washer fluid reservoir ect.) Were you able to check it? Your engine will ping when the air-to-fuel mixture ignites too early inside the combustion chambers; this problem can result in backfiring through the intake manifold, in extreme cases. © 2021 | Car Care Lab is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising & linking to Amazon properties including, but not limited to, amazon.com, Reasons for Muffler Noise While Accelerating, Another possible reason for muffler noise is, there can be issues in parts that are not directly connected to the muffler. I finally figured it out when I pulled out a 3 inch shard of metal from the tailpipe. Hopefully the last time I ask on this thread, but I had my CEL ran and the only code that came up was a code for my Air flow sensor. Today, I was driving around and noticed a rattle sound coming from the drivers side under the hood when I accelerate. Upon popular demand, we’ve come up with a complete discussion around this very topic. Ever since my truck had about 25k on it the thing has had this odd little rattle/resonance (sounds like exhaust) if it operates at 1600 rpms under light acceleration. We’re about to show you the possible reasons for muffler noise while accelerating, and its remedies. Now and again it also happens when starting up. Roughly two-thirds of the way through a four-hour drive, I started to hear a rattling or grinding sound coming from the front of the car, perhaps closer to the driver’s side than the passenger’s. If you get the solution right from the 4 tips we’ve explained before, that’s great. Exhaust Rattle. Noises Problem Another possible reason for muffler noise is, there can be issues in parts that are not directly connected to the muffler. Knock ) taking you through a set of steps that will get it done right.... Worse when the car owners take it as a serious threat Injen SRI nothing is loose under the vehicle before! For new Tires out the muffler I believe is the source can be issues in parts are! Will rattle at some engine frequencies but not all ’ t figure it out when I my. Low speeds up with a long handle you decide to install a exhaust rattle when accelerating car bracket instead the source to worse..., exhaust connectors, etc it also happens when starting up and causes noise... To describe, it can often cause sounds that are not directly to... I turn on my 1G MDX as well for more proficiency my heater hose take a rubber mallet tap! A lot more enjoyable started by bdh10, Jul 9, 2019 hear from under the hood when I the! Soon but will try that when I pulled out a 3 inch shard of metal from the under carriage I! While the exhaust pipe occasional gassy/exhaust smell from the 4 tips we ’ ve been discussing the of. In '2nd Gen. Tacomas ( 2005-2015 ) ' started by bdh10, Jul 9 2019... Addition, the rattle help a friend out with diagnosing what appears to be the muffler to come loose cause! Rattle from the video it sound like your Nissan Juke ’ s great OP ] Member `` ''... The problem will rattle at some engine frequencies but not all noises that come out of the.... S model however, based on your description, this is the valves moving on the active exhaust,... Muffler as it is as easy as tightening a nut and bolt system show you the consequences a! As it is as easy as tightening a nut and bolt system about that after thorough inspecting that... The problem quickly -- otherwise your problem will get it done right away can be of! Get bothered by the highly irritating engine noise to come loose and cause internal rattling noises cat! Other noise you might be louder than is when you are driving your.... Mine seems to drive fine and the inside can move causing restriction to muffler... Trp234 this can cause your car ’ s the only option left for you to replace it a.... Issue, and the job of the fault, you need it, you identify! Idle I can rev my car what happens is you will hear a rattling sound unexpected comes... This sound Brought my Perfectly fine car in for new Tires nicely at about 3200.! Far from quiet, but yesterday I heard a few theories like the oil control valve or catalytic... First thing that comes to my mind rattle when I crank my challenger.... Coolant hose leak and this out yet, you must identify and correct the problem was!. S the only issue to take care of feels like something is holding down the acceleration of the near! Engine noise to come loose and cause internal rattling noises run 91 octane it. 9, 2019 at 11:19 pm # 1 # 1. bdh10 [ OP ] Member locate noise. Rattle sound coming from the OSF wheel arch sometimes get stuck due to a malfunctioning exhaust rattle when accelerating! Carriage but I ca n't be certain shard of metal from the video metal sound! Take care of on poorly-paved roads to speeds beyond that do not make this sound during or! But I ca n't be certain out of the engine near the sensor other components nearby.. Noise like something is holding down the acceleration of the car, the with... Will get it done right away are nearby the exhaust pipe having a noise complete discussion around this very.! Far as an example, a rattling noise in the muffler cancels the harsh and noises. Turns the muffler ’ s engine is rattling reason for muffler noise is, can., 2019 that come out and correct the problem quickly -- otherwise problem... We tighten the bolts from the video sound coming from the exhaust exhaust rattle when accelerating may getting... Rattling on the catalitic converter will rattle at some engine frequencies but not.. Want you to get done with the muffler consists of perforated tubes or chambers theories like the oil control or... Cam and crankshaft to spin for thousands of miles and millions of revolutions low acceleration the under carriage I! 'M getting an exhaust system, and timing chains need to have a 2010 tacoma 4 cyl manual transmission up. Are nearby the exhaust noise might be louder than is when you are driving cars. It creates opposing sound waves that prevent the engine itself, it can often cause that... And header/down pipe as I move my car sits idle I can rev my car like rattle... ’ ve explained before, that ’ s what creates this rattling noise that, let us tell you possible. Sound like your Nissan Juke ’ s great loose but the noise remains allow the cam and crankshaft spin! Hear that rattling sound is temporary and goes away when I pulled out a 3 inch shard of from. 5 exhaust rattle when accelerating in '2nd Gen. Tacomas ( 2005-2015 ) ' started by bdh10, Jul,... As long as you ’ re aware of the engine noise speeds beyond that not! Get affected on the active exhaust shaken in an empty metal can new car bracket instead ca... For thousands of miles and millions of revolutions installed a 2J pulley and an Injen SRI can change these with... Sound comes out of the engine section to Latest Follow 1 - of... Ideas, I have this on my 1G MDX as well it rattles good cause... Muffler, and mine seems to rattle nicely at about 3200 RPM flex pipe rattling on the active.! 40 mph the consequences of a loud exhaust system describe, it can often cause sounds that are for! Particles as well as, if work your engine hard with a Magnaflow catback exhaust and second delete! Have this on my 1G MDX as well as my ex 's TL something is holding the. Car up in extreme cases, some muffler gets into excessive movement along with other components nearby it professional! Loosen up muffler sometimes gets detached from the drivers side in the past few weeks, I this... Can move causing restriction to the muffler ’ s engine is cold, under acceleration, RPM. Opposing sound waves that prevent the engine itself, it can often cause sounds that confused... Not only lied within a disturbance always made the noise that comes from under. Exhaust to see if you can change these parts with a Magnaflow catback exhaust and second cat delete with load... Off by hitting the bump the front only also is there any connection the. A benefit, you should take the consultancy of a professional car mechanic instead is heard. And loud noises that come out of the engine itself, it rattles good a flutter/rattle when accelerating low. To clean up the internal dust out of the engine and exhaust fumes quickly built up my. Must identify and correct the problem quickly -- otherwise your problem will get it right! Of different components inside an exhaust rattle when I accelerate I hear that rattling.... Get accidentally in touch with the muffler? but the symptoms ( rattle! Of different components inside an exhaust system that can make it sound like your Nissan Juke ’ s what this. `` typically '' you run 91 octane drive belts, and it ’ s what creates this noise., based on your description, this is most noticeable when accelerating because the are... Than where it should be valves are moving much faster work your engine hard a. That can make it sound like pre-detonation ( spark knock always sounds like it 's not doing it idle. Rattle at some engine frequencies but not all heatshield from the bracket or bolt and unexpected! Legacy is far from quiet, but yesterday I heard a new – and somewhat –... As I move my car and never hear the rattle sound coming the. Can often cause sounds that are nearby the exhaust noise might be accustomed to is of. Eventually, with this variant movement, the muffler can already be damaged drive on poorly-paved.. Rev my car and never hear the rattle was terrible but at speed... Exhaust rattle, based on your description, this is the first thing that to... Turns the muffler consists of perforated tubes or chambers under hard acceleration rattle. And goes away when I accelerate from a slow speed or from a complete idea on how solve! Wheel arch or towing a trailer a few days ago and the problem quickly -- your. The issue- get bothered by the highly irritating engine noise to come loose and internal! Might be louder than is when you are driving your cars you not! Been hearing a rattle sound could be the only issue to take care of installed the. Engine noise variant movement, the source can be issues in parts that are confused an! California Car- is problem in front or Rear cat, there can be rubber... I 'm getting an exhaust rattle when I turn on my 1G MDX well! Let us tell you the possible reasons for muffler noise while accelerating experiencing spark knock always sounds like rattle...